code: def testGetErrorClass(self):
      self.assertEqual(self.errorclasses[0], 0)
      for ierr in self.errorclasses:
          errcls = MPI.Get_error_class(ierr)
          self.assertGreaterEqual(errcls, MPI.SUCCESS)
          self.assertLessEqual(errcls, MPI.ERR_LASTCODE)
          self.assertEqual(errcls, ierr)
  
file_path: mpi4py/test/test_errorcode.py
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 1 for calling the TestErrorCode obj's underlying member method code with example usage: obj.testGetErrorClass() without return types